How much water is poisoned to produce a barrel of tar sands? Just ask Pepsi.

Over the last year, activists have been pushing PepsiCo and other companies using tar sands in their massive corporate vehicle fleets to do the right thing and stop using this dirty source of fuel that's poisoning our water, our climate, and our communities.

You might remember when activists unveiled a Pepsi can re-design in the hottest spots of San Francisco and New York City to highlight the company's use of tar sands.

You might remember all of these actions - and many others - because you helped make them happen. Over the last year, tens of thousands of activists have called on the PepsiCo CEO Indra Nooyi and on the company to stop using tar sands and slash oil use in their vehicle fleets.

While all this was happening, we've been working hard behind the scenes with the company to help them step up and do the right thing -- and it's the hard work of activists that has brought PepsiCo to the negotiating table.

Sadly, though, despite tens of thousands of people speaking up and taking action, despite the commitments that 19 other big companies have made around tar sands, PepsiCo hasn't made enough progress towards making the commitment to say no to this dirty fuel source. Conversations have been happening, but we know that conversations aren't enough. We know that using tar sands is not acceptable for the climate, for our communities, or for our water.

So, it's time to step up the game.

Over the next month, activists will be bringing the heat and getting serious with Pepsi, asking questions like this one: "How much water is poisoned to produce one barrel of tar sands? Just ask Pepsi." You can help out by sharing the graphic featured in this blog post on your social media pages and by posting it to Pepsi's Facebook wall.

We've been asking nicely. Earlier this year, we released a report and sent it right to the PepsiCo Board of Directors highlighting the effects of tar sands on water, an issue that PepsiCo publically says it cares a lot about. But now's the time to ask the hard questions.